<template>
  <div id="root">
    <div class="todo-container">
      <div class="todo-wrap">
        <Header :addTodo="addTodo"/>
        <List :todoList="todoList" :deleteTodo="deleteTodo" :checkTodo="checkTodo"/>
        <Footer :todoList="todoList" :deleteDoneTodo="deleteDoneTodo"/>
      </div>
    </div>
  </div>
</template>

<script>
import Header from "./components/Header";
import List from "./components/List";
import Footer from "./components/Footer";

export default {
  name: "App",
  components: { Header, List, Footer },
  data() {
    return {
      todoList: [
        { id: "asdasd1", title: "吃饭", done: true },
        { id: "asdasd2", title: "睡觉", done: false },
        { id: "asdasd3", title: "打程程", done: false },
        { id: "asdasd4", title: "谈恋爱", done: true },
      ],
    };
  },
  methods: {
    // addTodo用于向todoList中添加一个todo对象
    addTodo(todoObj){
      this.todoList.unshift(todoObj)
    },
    // deleteTodo用于在todoList中删除一个todo对象
    deleteTodo(id){
      this.todoList = this.todoList.filter( t => t.id !== id )
    },
    // checkTodo用于在todoList中勾选一个todo对象
    checkTodo(id,done){
      // 第一个写法
      this.todoList.forEach((t)=>{
        if(t.id === id){
          t.done = done
        }
      })

      // 第二种写法
     /*  const x = this.todoList.find((t)=>{
        return t.id === id
      })
      x.done = done */

    },
    // deleteDoneTodo用于在todoList中删除所有已完成的
    deleteDoneTodo(){
      this.todoList = this.todoList.filter(t => !t.done)
    }
  },
};
</script>

<style>
/*base*/
body {
  background: #fff;
}
.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}
.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}
.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}
.btn:focus {
  outline: none;
}
.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>